紧急求救

waterman

<  align=center><B><FONT face="Times New Roman">A</FONT></B><B>题</B><B><FONT face="Times New Roman">  </FONT></B><B>零件加工的排序问题</B><B><p></p></B></P>
< ><FONT size=3>（1）</FONT>       <FONT size=3>设有<FONT face="Times New Roman">n</FONT>个零件需要在机床<FONT face="Times New Roman">A</FONT>、<FONT face="Times New Roman">B</FONT>上加工，每个零件都必须先经过机床<FONT face="Times New Roman">A</FONT>加工，再经过机床<FONT face="Times New Roman">B</FONT>加工这两道工序。以</FONT><v:shapetype><FONT face="Times New Roman"><FONT size=3> <v:stroke joinstyle="miter"></v:stroke><v:formulas><v:f eqn="if lineDrawn pixelLineWidth 0"></v:f><v:f eqn="sum @0 1 0"></v:f><v:f eqn="sum 0 0 @1"></v:f><v:f eqn="prod @2 1 2"></v:f><v:f eqn="prod @3 21600 pixelWidth"></v:f><v:f eqn="prod @3 21600 pixelHeight"></v:f><v:f eqn="sum @0 0 1"></v:f><v:f eqn="prod @6 1 2"></v:f><v:f eqn="prod @7 21600 pixelWidth"></v:f><v:f eqn="sum @8 21600 0"></v:f><v:f eqn="prod @7 21600 pixelHeight"></v:f><v:f eqn="sum @10 21600 0"></v:f></v:formulas><v:path connecttype="rect" gradientshapeok="t" extrusionok="f"></v:path><lock aspectratio="t" v:ext="edit"></lock></FONT></FONT></v:shapetype><v:shape><v:imagedata></v:imagedata></v:shape><FONT size=3>、</FONT><v:shape><FONT face="Times New Roman"><FONT size=3> <v:imagedata></v:imagedata></FONT></FONT></v:shape><FONT size=3>分别表示零件<FONT face="Times New Roman">i</FONT>在<FONT face="Times New Roman">A</FONT>、<FONT face="Times New Roman">B</FONT>上的加工时间。问应如何安排各零件加工的顺序，使总加工时间（即从机床<FONT face="Times New Roman">A</FONT>加工第一个零件开始到机床<FONT face="Times New Roman">B</FONT>将最后一个零件加工完止所需时间）最短。请给出最佳的排序算法。</FONT></P>
< ><FONT size=3><FONT face="Times New Roman"> <p></p></FONT></FONT></P>
<TABLE  cellSpacing=0 cellPadding=0 align=left border=1>

<TR >
<TD  vAlign=top width=98>
<P ><FONT face="Times New Roman">        </FONT>零件<p></p></P>
<P >机床（分钟）<p></p></P></TD>
<TD  vAlign=top width=35>
<P ><FONT face="Times New Roman"> <p></p></FONT></P>
<P ><FONT face="Times New Roman">1</FONT></P></TD>
<TD  vAlign=top width=35>
<P ><FONT face="Times New Roman"> <p></p></FONT></P>
<P ><FONT face="Times New Roman">2</FONT></P></TD>
<TD  vAlign=top width=35>
<P ><FONT face="Times New Roman"> <p></p></FONT></P>
<P ><FONT face="Times New Roman">3</FONT></P></TD>
<TD  vAlign=top width=35>
<P ><FONT face="Times New Roman"> <p></p></FONT></P>
<P ><FONT face="Times New Roman">4</FONT></P></TD>
<TD  vAlign=top width=35>
<P ><FONT face="Times New Roman"> <p></p></FONT></P>
<P ><FONT face="Times New Roman">5</FONT></P></TD>
<TD  vAlign=top width=35>
<P ><FONT face="Times New Roman"> <p></p></FONT></P>
<P ><FONT face="Times New Roman">6</FONT></P></TD>
<TD  vAlign=top width=35>
<P ><FONT face="Times New Roman"> <p></p></FONT></P>
<P ><FONT face="Times New Roman">7</FONT></P></TD></TR>
<TR >
<TD  vAlign=top width=98>
<P ><FONT face="Times New Roman">   A</FONT></P></TD>
<TD  vAlign=top width=35>
<P ><FONT face="Times New Roman">5</FONT></P></TD>
<TD  vAlign=top width=35>
<P ><FONT face="Times New Roman">7</FONT></P></TD>
<TD  vAlign=top width=35>
<P ><FONT face="Times New Roman">14</FONT></P></TD>
<TD  vAlign=top width=35>
<P ><FONT face="Times New Roman">9</FONT></P></TD>
<TD  vAlign=top width=35>
<P ><FONT face="Times New Roman">6</FONT></P></TD>
<TD  vAlign=top width=35>
<P ><FONT face="Times New Roman">12</FONT></P></TD>
<TD  vAlign=top width=35>
<P ><FONT face="Times New Roman">9</FONT></P></TD></TR>
<TR >
<TD  vAlign=top width=98>
<P ><FONT face="Times New Roman">   B</FONT></P></TD>
<TD  vAlign=top width=35>
<P ><FONT face="Times New Roman">9</FONT></P></TD>
<TD  vAlign=top width=35>
<P ><FONT face="Times New Roman">15</FONT></P></TD>
<TD  vAlign=top width=35>
<P ><FONT face="Times New Roman">4</FONT></P></TD>
<TD  vAlign=top width=35>
<P ><FONT face="Times New Roman">17</FONT></P></TD>
<TD  vAlign=top width=35>
<P ><FONT face="Times New Roman">8</FONT></P></TD>
<TD  vAlign=top width=35>
<P ><FONT face="Times New Roman">5</FONT></P></TD>
<TD  vAlign=top width=35>
<P ><FONT face="Times New Roman">3</FONT></P></TD></TR>
<TR >
<TD  vAlign=top width=98>
<P ><FONT face="Times New Roman">   C</FONT></P></TD>
<TD  vAlign=top width=35>
<P ><FONT face="Times New Roman">13</FONT></P></TD>
<TD  vAlign=top width=35>
<P ><FONT face="Times New Roman">6</FONT></P></TD>
<TD  vAlign=top width=35>
<P ><FONT face="Times New Roman">12</FONT></P></TD>
<TD  vAlign=top width=35>
<P ><FONT face="Times New Roman">3</FONT></P></TD>
<TD  vAlign=top width=35>
<P ><FONT face="Times New Roman">7</FONT></P></TD>
<TD  vAlign=top width=35>
<P ><FONT face="Times New Roman">6</FONT></P></TD>
<TD  vAlign=top width=35>
<P ><FONT face="Times New Roman">6</FONT></P></TD></TR></TABLE>
<P ><FONT size=3>（2）</FONT>       <FONT size=3><FONT face="Times New Roman"> </FONT>若这批零件需要在<FONT face="Times New Roman">A</FONT>、<FONT face="Times New Roman">B</FONT>和<FONT face="Times New Roman">C</FONT>三台机床上加工，又该如何安排各零件加工的顺序？并对下表所给数据给出具体的零件加工排序。</FONT></P>
<P ><FONT face="Times New Roman"><FONT size=3> <p></p></FONT></FONT></P>
<P ><FONT face="Times New Roman"><FONT size=3> <p></p></FONT></FONT></P>
<P ><FONT face="Times New Roman"><FONT size=3> <p></p></FONT></FONT></P>
<P ><FONT face="Times New Roman"><FONT size=3> <p></p></FONT></FONT></P>
<P ><FONT face="Times New Roman"><FONT size=3> <p></p></FONT></FONT></P>
<P ><FONT face="Times New Roman"><FONT size=3> <p></p></FONT></FONT></P>
<P ><FONT face="Times New Roman"><FONT size=3> <p></p></FONT></FONT></P>
<P ><FONT face="Times New Roman"><FONT size=3> <p></p></FONT></FONT></P>
<P ><FONT face="Times New Roman"><FONT size=3> <p></p></FONT></FONT></P>
<P ><FONT size=3><FONT face="Times New Roman">   </FONT>（<FONT face="Times New Roman">3</FONT>）对<FONT face="Times New Roman">n</FONT>台机床、<FONT face="Times New Roman">m</FONT>个零件的加工，试给出一般的排序方法；并说明该方法是合理的。</FONT></P>

seed

<>日 大哥  我们都是一个学校的你这样搞  我们还搞个毛阿   </P>[em08]